I used a MQA DAC (meridian explorer 2) with an MQA test file. Why ? because when an MQA file is read bit perfect, the MQA led indicator is "on", when the software and the driver decode the audio file MQA in perfect bit.

The results :

Only VIRTUAL DJ, was able to read the MQA file in bit perfect mode, without loss of bits, whereas Serato, Rekordbox, Traktor even with all the possible options and without effects to apply, can not decode the sound without modifications of the bits.

Virtual DJ is the winner, because when no effects are applied and without auto gain, in Wasapi Shared mode, VirtualDJ respects the original sound of a track, before any effects application DJ :) (no need of exclusive mode on WIN10, Wasapi is improved in latest version of Windows, as good as OSX core AUDIO) or ASIO.

And in VirtualDj, the drivers audio can be managed in 32int or 32float bit, depend on kind of Soundcard/DAC. (and it display the bit resolution of the driver )It's a cool feature :)

And everything is done not to change the sound of the orginal track, as long as the effects are not used

So congratulations to the team of VIRTUAL DJ, and the developer of the AUDIO part of the software, because in 2019, it is the only DJ software that respects the sound better than other competitors.

-> Adion : It's not nice( :) ) to close the another post, that was more developped, cleaner about changes an Volume/gain.

locodog wrote :

Also rekordbox & prime are set at +2dB.

I don't fully understand the test, but if you're going to post, let's compare apples to apples.

->No Rekordbox & prime at set to 0dB or default for this test, but internal AUDIO engine of those software change the Gain even with AUTO-GAIN off, or no auto gain option available, or volume Knob available....

Denon engine prime 1.2.2/1.2.3 : This Software change the gain and volume of the original audio[/B :The clock drift is good like VDJ

Traktor 3 pro trial : Even at 0dB gain and auto gain on off, and no limiter, the Traktor audio engine, change the Gain/volume (even at 0dB setting in the Software) and the clock drift (6.48 ppm) and phase :

Serato DJ lite (same engine that Serato) : Even at 0dB gain and auto gain on off, and no limiter, the Serato audio engine, change the volume and the clock drift (3.53 ppm) and phase :

Rekordbox Performance mode : The record was made with internal record mode in .wav (lossless) at 16/44.1 same as original, with no auto gain option and no Headroom :-> the software as aPPM (7.65 ppm) clock problem, big phase problem, and modify the gain of the original audio :

olivierbergmanPRO InfinityMember since 2003A precision :These tests were done with OSX and core audio bit perfect; and the capture software (https://rogueamoeba.com/audiohijack) also perfect bit to record a wav. Because neither VB HIFI cable nor Voicemeter virtual asio are 100% perfect bit with Windows, but only 25% after analysis. Then the samples (original and recorded with audiohijack) are automatically aligned in the analysis software (Delta Wav - https://deltaw.org/) in a window of 20 or 60 sec to avoid bit shifts between the beginning and the end of the sample between the two lossless .wav at same 16 / 44.1 resolution :) So OSX for the comparative records and WIN10 for the comparison software Delta Wav - https://deltaw.org/.

Otherwise Replay music 8 on Windows 10, with direct APPS recording feature, is another solution because tested BIT perfect; also. On the other hand other software tests with "Wasapi loopback" like Audacity, are not perfect BIT. (after analysis with Delta Wav).

But the best for the perfect BIT in Shared mode and exclusive mode is the MacOSX Core Audio with audiohijack (https://rogueamoeba.com/audiohijack). More flexible and less complicated than Wasapi / ASIO .......Posté Sat 23 Feb 19 @ 6:15 am

loved their official response and most not even that interesting and, as always, for pioneer simply close they disliked the subject

Yes, they close the subject. I was ready to help Pioneer to fix and improve audio issues. And no answer from private support... (ticket open)

Rekordbox works at best with :Internal mode : -6dB of Headroom if the master volume KNOB is at MAXIMUMExternal mode : +6db Headroom if the master volume KNOB is at MAXIMUMBut still PHASE changes problems with Audio engine.